Dryer or washer dryer

ABSTRACT

Disclosed is a dryer or a washer dryer, including at least a clothes drying system, where the clothes drying system includes a heating structure and a condensing structure; the condensing structure is arranged on a lower part of the dryer or the washer dryer; the condensing structure includes an air inlet and an air outlet for hot air, and further includes a gas inlet and a gas outlet for cold air, and a heat exchanger is arranged inside the condensing structure; the heat exchanger is composed of fins which are superposed in a longitudinal-transverse alternating manner, and a frame with an enclosure structure is arranged outside the heat exchanger.

CROSS REFERENCE TO RELATED APPLICATION(S)

This application is a U.S. National Stage Entry of International PatentApplication No. PCT/CN2014/079582, filed Jun. 10, 2014, which claimspriority to Chinese Patent Application No. 201410097912.5, filed Mar.14, 2014, the disclosures of which are hereby incorporated entirelyherein by reference.

TECHNICAL FIELD

The present disclosure relates to the field of clothes drying, andparticularly relates to a dryer or a washer dryer.

TECHNICAL BACKGROUND

With the continuous upgrading and optimization of energy efficiencystandards in the household appliance industry, more and more users beginto focus on energy efficiency parameters of products, and energyconservation and environment protection have become a developmentdirection of the industry.

Therefore, a drying capacity of a three-in-one clothes washing-dryingmachine with functions of washing, dehydrating and drying is alsoupgraded with the updating of the industry. During a drying process of adrum clothes washing-drying machine, energy is used for both evaporatingwater of clothes into steam and continuing to condense the evaporatedsteam into water vapor.

There are three types of condensation manners in the industry currently.The first manner is that cold water of running water is used forcondensing steam, and the manner has the advantages of low manufacturingcost and simple application, and has the disadvantage of high waterconsumption due to the need of continuous water feeding and cooling inrunning of the machine. The second manner is that a compressor is usedand a refrigerant is used for condensing the steam by virtue of aprinciple of the compressor, and the manner has the advantages of lowenergy efficiency, and low water consumption and power consumption, andhas the disadvantages of high cost, high price and no benefit topopularization. The third manner is that an air heat exchanger is usedand external air is used for condensing the steam, and the manner saveswater and power, and has low equipment cost in spite of condensationefficiency which is lower than that of a compressor.

In the existing art, a heat exchanger is made of an aluminum alloymaterial, and is produced in two ways; one way is an aluminum alloy flatplate design which facilitates the steam to pass, and the other way is azigzag aluminum plate design which facilitates heat dissipation. At mosttwo heat dissipation paths are produced generally due to a space limitof the clothes dryer, the production cost of the aluminum alloy materialis high, the heat dissipation effect is limited by a production processfor aluminum alloy sheets, and the contact area of the steam and acondenser is small and not beneficial to steam condensation.

In order to increase a heat dissipation area, a plastic sheet-type heatexchanger is formed by stacking and lapping a plurality of fins whichare arranged in a longitudinal-transverse alternating manner, and ismade from a plastic material and simple to form; the thickness iscontrollable and can be controlled to be quite thin; the number of thefins can be increased in an effective space, so that the heatdissipation area can be increased, and then the heat exchange efficiencyis increased; the fins are directly placed and stacked in alongitudinal-transverse alternating manner without the need of otherconnection components, and positioning is simple and accurate; however,thinner sheets bring reduced strength and reduced reliability, and aredeformed after being used for a long time, thereby influencing productperformance; a frame is additionally arranged outside the heatexchanger, the plastic sheet-type heat exchanger is required to achievea small production thickness and a large number, and the plasticsheet-type heat exchanger and the frame are mutually assembled; lots oflint are generated during a clothes drying process, and the machine isnot easy to clean in case of being blocked by the lint; the section areaof each air duct of the clothes drying machine is different from thesection area of an air inlet of a heat exchange structure of an aircondenser, easily causing air inlet non-uniformity of a condensingstructure; and an unsatisfactory condensing effect is caused due to theair inlet non-uniformity of the condensing structure.

In view of this, the present disclosure is set forth.

SUMMARY

The objective of the present disclosure is to overcome the shortages ofthe existing art, and provide a clothes dryer or a washer dryer providedwith a condensing structure having high heat exchange efficiency.

In order to realize the objective, the following technical solution isadopted in the present disclosure: a clothes dryer or a washer dryer,including at least a clothes drying system, where the clothes dryingsystem includes a heating structure and a condensing structure; thecondensing structure is arranged on a lower part of the dryer or thewasher dryer; the condensing structure includes an air inlet and an airoutlet for hot air, and further includes a gas inlet and a gas outletfor cold air, and a heat exchanger is arranged inside the condensingstructure; the heat exchanger is composed of fins which are superposedin a longitudinal-transverse alternating manner, and a frame with anenclosure structure is arranged outside the heat exchanger.

A length direction of the condensing structure is arranged vertically toa front panel or a side plate of the washer dryer; an air inlet of thecondensing structure is located in an upper part, an air outlet of thecondensing structure is located in a lower part, and the air inlet andthe air outlet are communicated with a drum through an air ductrespectively; and one of the gas inlet and the gas outlet is providedwith fans, and the other one is communicated with the atmosphere.

The heat exchanger includes a plurality of fins which are superposed up;two opposite side edges of each fin are bent upwards to form aventilating air path in coordination with an upper fin, and adjacentfins are arranged in a mode of vertical-horizontal alternating so as toform transversal air paths and longitudinal air paths independent fromeach other; the longitudinal air path is vertically arranged tocorrespond to the air inlet and the air outlet; the transversal air pathis horizontally arranged to correspond to the gas inlet and the gasoutlet; downwards convex pins may be arranged on lower surfaces of twoupwards bent side edges of the fin, and downwards concave slots arearranged in upper surfaces of other two sides edges, and pins of thefins are inserted into slots on lower fins so as to connect an upper anda lower adjacent fins.

A plurality of downward profiled grooves are provided in parallel areprovided in a direction vertical to the air path formed by the fin andan upper fin, and an air path formed with a lower fin is divided into aplurality of parallel air paths by the profiled grooves; downwardprofiled grooves may be provided on the fin in an air inlet and an airoutlet in the front and rear of air paths formed between the fin and anupper fin, and the profiled grooves form the slots; and, a profileddepth on both ends of the profiled groove may be greater than a profileddepth in middle of the profiled groove, so that a downward bulge isformed, so as to form the pin.

Four side edges of the fin are bent outwards to form turn-ups; turn-upsof adjoining upper and lower fins are overlapped, turn-ups at the slotsare overlapped and fitted closely on turn-ups, which are bent upwardsfirst before bent outwards, on a lower fin; and, the fins may be plasticfins.

Frame plates are arranged on an upper side, a lower side, a left side, aright side, a front side and a rear side of the heat exchanger, and theframe is of an enclosure structure formed by connecting the frame platesarranged on the sides of the heat exchanger; wherein through holescooperated with air paths of an internal heat exchanger are arranged intwo groups of frame plates opposite to the transversal air path andlongitudinal air path, and the other group of opposite frame plate areflat plates; and, the through holes may be rectangular through holesarranged transversally and longitudinally.

A connection part is arranged at the junction of each frame plate on theframe, and adjacent frame plates are connected through connection parts;each connection part may be of a buckle structure; a plurality ofparallel grooves may be arranged on internal surfaces of two groups offrame plates with the through holes, and the grooves correspond to theclosely fitted turn-ups, and the closely fitted turn-ups are insertedinto the grooves of internal surfaces of corresponding frame plates;and, a plurality of sheet-shaped bulges vertical to frame plates may bearranged on adjacent edges of the two groups of frame plates with thethrough holes; a shape of the sheet-shaped bulges is identical with thatof a space between corresponding adjacent turn-ups at the pin, and thesheet-shaped bulges are respectively inserted into the space betweencorresponding adjacent turn-ups at the pins.

An upper cover plate is arranged at the hot air inlets of the heatexchanger, the upper cover plate has a inclined top surface, the uppercover plate forms a chamber with the heat exchanger, and the air inletof the condensing structure is formed on the chamber at one end wherethe upper cover plate is inclined highly and away from the heatexchanger; a lower cover plate is arranged at the hot air outlets of theheat exchanger, one side of the lower cover plate is the air outlet ofthe condensing structure; and the upper cover plate and the lower coverplate are connected with flat frame plates.

A filtering structure is arranged between the air inlet of thecondensing structure and the hot air inlets of the heat exchanger; thefiltering structure is arranged between the air inlet of the condensingstructure and the hot air inlet of the heat exchanger in apushable-pullable manner; the filtering structure may be arranged in thechamber, the filtering structure is slidably connected with sidewalls ofthe chamber, one end of the filtering structure protrudes out of thechamber, and when one end of the filtering structure is located in theinnermost part of the chamber, the other end of the filtering structureis located outside the chamber and hermetically connected with anopening of the chamber through which the filter penetrates; and, slidingchutes/sliding blocks may be arranged on two side edges of the filteringstructure, and sliding blocks/sliding chutes are arranged oncorresponding sidewalls of the chamber, and the sliding chutes/slidingblocks are matched with the sliding blocks/sliding chutes so as to formsliding connection.

A flushing structure is arranged between the air inlet of the condensingstructure and the hot air inlets of the heat exchanger; the flushingstructure may include a spray layer and a sealing cover which form acavity; a plurality of spray holes are arranged in the spray layer;water inlets are arranged in the sealing cover; the spray layer servesas the upper cover plate arranged at the hot air inlets of the heatexchanger; the sealing cover is arranged on an upper part of the uppercover plate and hermetically connected with the upper cover plate, and aplurality of spray holes are arranged in the upper cover plate.

An air intake uniform structure is arranged between the air inlet of thecondensing structure and the hot air inlets of the heat exchanger; aplurality of vertical ribbed slabs may be arranged in the air inlet andon an inner surface of top of the upper cover plate so as to divide theair inlet into a plurality of uniform air paths, so that the air intakeuniform structure is formed; an air outtake uniform structure isarranged between the air outlet of the condensing structure and the hotair outlets of the heat exchanger; and, a lower cover plate may bearranged at a condensed hot air outlet of the heat exchanger, aplurality of air outlets are arranged on one side of the lower coverplate, and the plurality of air outlets in a shape of Chinese character“

” are communicated to a general air outlet, so that the air outtakeuniform structure is formed.

After the technical solution of the present disclosure is adopted, thefollowing beneficial effects are brought:

1. The heat exchanger in the present disclosure is composed of theplastic fins, and is simple to form; the thickness is controllable andcan be controlled to be quite thin; the number of the fins can beincreased in an effective space, so that the heat dissipation area canbe increased and then the heat exchange efficiency is increased; and theprofiled grooves are capable of playing a role of location, forming theair paths to guide air flows, enhancing the strength of the fins toprevent deformation, and increasing the contact heat dissipation area toincrease the heat exchange efficiency.

2. The frame is arranged outside the heat exchanger in the presentdisclosure, and is capable of fixing the heat exchanger, enhancing thestrength of the heat exchanger, improving the running reliability of theheat exchanger, prolonging the service life, reducing the failuremaintenance rate of the machine, and reducing the maintenance cost ofthe machine; and the frame and each fin are positioned and connected,mutually assembled, mutually supported and firmly connected, and theframe is simple in structure and convenient to install.

3. The filtering structure is arranged in the present disclosure, andused for filtering lint generated during a clothes drying process,thereby avoiding blockage for the air paths of the heat exchanger, andthe filtering structure is slidably connected in a withdrawing manner,and can be withdrawn to be cleaned, and the operation is convenient.

4. The flushing structure is arranged in the present disclosure, and iscapable of automatically washing the lint in the filtering structure orthe air paths of the heat exchanger, thereby avoiding the increase of awind drag coefficient of the system due to the lint, and prolonging theservice life of the heat exchanger; and water flows are adopted forwashing instead of manual cleaning, thereby improving the automationlevel of the machine.

5. The air uniform structures are arranged in the present disclosure,and the air flows at the air inlet and the air outlet are uniformlytransited, and are uniformly distributed into all the air paths of theheat exchanger to be condensed; on one hand, the non-uniformity of hotair is avoided, and then the heat exchange efficiency is increased; andon the other hand, the influence of non-uniformity of a pressure causedby the non-uniformity of the air flows on the system is avoided.

The specific embodiments of the present disclosure will be furtherdescribed below in detail with reference to the accompanying drawings.

DESCRIPTION OF DRAWINGS

FIG. 1 is an external structural diagram of a clothes dryer machine or awasher dryer of the present disclosure;

FIG. 2 is an internal structural drawing of a clothes dryer or a washerdryer of the present disclosure;

FIG. 3 is a structural diagram of an air condensing structure in thepresent disclosure;

FIG. 4 is an exploded diagram of an air condensing structure in thepresent disclosure;

FIG. 5 is a schematic diagram of air paths of a heat exchanger in thepresent disclosure;

FIG. 6 is a structural diagram of a heat exchanger with a frame in thepresent disclosure;

FIG. 7 is an enlarged diagram of a part A in FIG. 6;

FIG. 8 is an enlarged diagram of a part B in FIG. 6;

FIG. 9 is an exploded diagram of a heat exchanger in the presentdisclosure;

FIG. 10 is a structural diagram of a stacked heat exchanger in thepresent disclosure;

FIG. 11 is an exploded diagram of a stacked heat exchanger in thepresent disclosure;

FIG. 12 is a schematic diagram of air paths of a stacked heat exchangerin the present disclosure;

FIG. 13 is a structural diagram of a flushing structure in the presentdisclosure;

FIG. 14 is a structural diagram of air uniform structures in the presentdisclosure; and

FIG. 15 is a structural diagram of an upper cover plate in the presentdisclosure.

REFERENCE NUMBERS

-   1: Fin; 11: First Fin; 12: Second Fin; 4: Pin; 5: slot; 6: Profiled    Groove; 7: Turnup 8: Frame Plate; 9: Through Hole; 13: Notch; 14:    Clamping Column; 15: Clamping Bulge; 16: Hole; 17: Clamping Tongue;    18: Clamping Port; 19: buckle; 20: Clamping Groove; 21: groove; 22:    Sheet-Shaped Bulge; 23: Sealing Baffle Plate; 24: Hot Air Inlet; 25:    Upper Cover Plate; 26: Filtering Structure; 27: Air Duct; 28:    Chamber; 29: Front Panel; 30: Drum; 31: Hot Air path; 32: Cold Air    path; 33: Gas Inlet; 34: Fan; 35: Heat Exchanger; 36: Air Inlet; 37:    Air Outlet; 38: Ribbed Slab; 39: Lower Cover Plate; 40: Spray Layer;    41: Sealing Cover; 42: Spray Hole; 43: Water Inlet; 44: Water Pump;    45: Gas Inlet; And 46: Side Plate.

DETAILED DESCRIPTION

As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, a clothes dryer or awasher dryer of the present disclosure at least includes a clothesdrying system, where the clothes drying system includes a heatingstructure and a condensing structure; the condensing structure isarranged on a lower part of a drum 30 of the clothes dryer or the washerdryer; the condensing structure includes an air inlet 36 and an airoutlet 37 for hot air, and further includes a gas inlet 33 and a gasoutlet 45 for cold air, and a heat exchanger 35 is arranged inside thecondensing structure; the heat exchanger 35 is composed of fins whichare superposed in a longitudinal-transversely alternating manner; theheat exchanger 35 includes two groups of air paths which are mutuallyintersected, one group of the air paths is connected with a hot air path31, and the other group of the air paths is connected with a cold airpath 32; and a frame with an enclosure structure is arranged outside theheat exchanger 35.

A length direction of the condensing structure is arranged vertically toa front panel 29 or a side plate 46 of the clothes dryer or the washerdryer; and, the length direction of the condensing structure may bearranged vertically to the front panel 29 of the clothes dryer or thewasher dryer.

The air inlet 36 of the condensing structure is located in the upperpart, and the air outlet 37 is located in the lower part; in this way,during a process that hot air passes through the condensing structure,water vapor in the hot air is condensed into condensed water with cold,and can flow downwards to a condensed water collection device along theinner wall of the condensing structure under the action of gravity; theair inlet 36 and the air outlet 37 are communicated with the drum 30through an air duct 27 of the clothes drying machine respectively; andone of the gas inlet 33 and the gas outlet 45 is provided with fans, andthe other one is communicated with the atmosphere.

The gas inlet 33 is arranged in the front part of the washer dryer, andthe gas outlet 45 is arranged in the rear part of the washer dryer; thefans 34 are arranged at the gas outlet 45, and can also be arranged atthe gas inlet 33; air is sucked from the front part under the effect ofthe fans 34, subjected to heat exchange with the hot air in the heatexchanger 35 and then exhausted from the rear part; the front part ofthe clothes dryer or the washer dryer needs to be opened for taking andplacing clothes, and there is no obstacle generally; the gas inlet 33 isarranged in the front part of the clothes dryer or the washer dryer, andcapable of ensuring the smoothness of gas inlet; and the gas outlet 45is arranged in the rear part of the clothes dryer or the washer dryer,and air is exhausted from the rear part, without interference on a frontuser.

In order to increase the heat exchange efficiency of the condensingstructure, a stacked heat exchanger is adopted in the presentdisclosure, and is made from a plastic material and simple to form; thethickness is controllable and can be controlled to be quite thin; thenumber of the fins can be increased in an effective space, so that theheat dissipation area can be increased, and then the heat exchangeefficiency is increased; and positioning is simple and accurate.

As shown in FIG. 10, FIG. 11 and FIG. 12, the stacked heat exchangerincludes a plurality of fins 1 which are superposed up, and two oppositesides of each fin 1 are bent upwards and cooperated with the upper fin 1of the fin to form a ventilating air path; two adjacent fins 1 arearranged in a longitudinal-transverse alternating manner to form atransversal air path and a longitudinal air path which are mutuallyindependent and spaced in an up-down direction, where a high-temperatureair flow can pass through the transversal air path, and alow-temperature air flow can pass through the longitudinal air path; orthe low-temperature air flow can pass through the transversal air path,the high-temperature air flow can pass through the longitudinal airpath, and the air flows at different temperatures indirectly contactinside to carry out heat exchange. Each fin 1 is made from a plasticmaterial and simple to form; the thickness is controllable and can becontrolled to be quite thin; and the number of the fins can be increasedin an effective space, so that the heat dissipation area can beincreased, and then the heat exchange efficiency is increased.

Where each longitudinal air path is vertically arranged, correspondingto the air inlet 36 and the air outlet 37 of the condensing structure,and connected with the hot air path 31; and each transversal air path ishorizontally arranged, corresponding to the gas inlet 33 and the gasoutlet 45 of the condensing structure, and connected with the cold airpath 32.

Downwards convex pins 4 are arranged on the lower surfaces of the twoupwards bent sides of each fin 1, slots 5 matched with the pins 4 arearranged at an air inlet and an air outlet in the front part and therear part of the air path of each fin 1; the fins 1 are arranged in alongitudinal-transverse alternating manner; the pins 4 of theupper-layer fin correspond to the positions of the slots 5 of thelower-layer fin; and the pins 4 of the upper-layer fin are inserted intothe slots 5 of the lower-layer fin of the fin to connect the upper andlower adjacent fins.

Each fin 1 is provided with a plurality of downward profiled grooves 6in parallel in a manner of being vertical to the direction of the airpath formed by the fin and the upper fin of the fin, and the profiledgrooves 6 are used for dividing the air path formed by the fin and thelower fin of the fin into a plurality of parallel air paths. Theprofiled grooves 6 are capable of forming the air paths to guide the airflows, enhancing the strength of the fins to prevent deformation, andplaying a role of reinforcing ribs; and the addition of the plurality ofprofiled grooves 6 is equivalent to the increase of the contact heatdissipation area on the same projection area, and then the heat exchangeefficiency is increased.

Each fin 1 is provided with downward profiled grooves 6 at an air inletand an air outlet in the front part and the rear part of the air pathformed by the fin and the upper fin of the fin, and the profiled grooves6 form the slots 5, that is, the profiled grooves 6 at the air inlet, ofeach fin 1, are the slots 5; a profiled depth of each of the two ends ofeach profiled groove 6 is greater than a profiled depth of the middle ofthe profiled groove to form a downward bulge, thereby forming one of thepins 4; in this way, one of the pins 4 can be formed only by changingthe profiled depth, without independent profiling for the pin 4, so thatthe forming process is simplified; therefore, the positions of the pins4 and the positions of the profiled grooves 6 are in one-to-onecorrespondence; however, the positions of the pins 4 are not limited tobe corresponding to the positions of the profiled grooves 6 only, andthe pins 4 can be distributed at any positions of the lower surfaces ofthe two upwards bent sides; and one pin is arranged at each of the twoends and at least one pin is distributed at the middle for the best.

Four sides of each fin 1 are bent outwards to form turn-ups 7, theturn-ups 7 of each upper and lower adjacent fins are superposed, theturn-ups 7 at the slots 5 are superposed onto the turn-ups 7 which arebent upwards and then bent outwards, of the lower fin of the fin, andthe turn-ups are closely bonded to form a sealed air path, where theturn-ups of the two upwards bent sides are higher than the correspondingfin, the turn-ups of the two sides provided with the slots are lowerthan the corresponding fin, and the lower turn-ups at the slots of theupper-layer fin are superposed onto the higher turn-ups at the upwardsbent parts of the lower-layer fin, and the turn-ups are closely bondedto form a sealed air path, and play a role of limiting simultaneously.The fins are positioned and connected by virtue of the pins 4, the slots5 and the bent turn-ups 7, and are directly placed and stacked in alongitudinal-transverse alternating manner, without the need of otherconnection parts; and positioning is simple and accurate.

The thickness of each fin 1 is 0.2 mm to 0.5 mm, the thickness of eachfin body is greatly reduced relative to an aluminum alloy heatexchanger, and more heat exchange fins can be arranged in a limitedspace, thus the heat exchange area is increased, and then the heatexchange efficiency is increased.

The heat exchanger 35 is formed by the plurality of groups of fins in astacked manner, and the fins include first fins 11 and second fins 12;the two long sides of each first fin 11 are bent upwards and cooperatedwith the upper fin of the first fin to form a ventilated air path; thetwo short sides of each second fin 12 are bent upwards and cooperatedwith the upper fin of the second fin to form a ventilated air path; thefirst fins 11 and the second fins 12 are of the same structure whilebeing square, and the first fins 11 and the second fins 12 arealternately arranged to form a transversal air path and a longitudinalair path which are mutually independent and spaced in an up-downdirection. Turn-ups which extend outwards are arranged around each fin,where the turn-ups of the two upwards-bent sides are higher than thecorresponding fin, the turn-ups of the two sides provided with the slotsare lower than the corresponding fin, and the lower turn-ups at theslots of the upper-layer fin are superposed onto the higher turn-ups atthe upwards bent parts of the lower-layer fin, and the turn-ups areclosely bonded to form a sealed air path.

During use of the machine, one air path is in a horizontal direction,and the other air path is in a vertical direction; a low-temperature airflow passes through the air path in the horizontal direction, and ahigh-temperature air flow passes through the air path in the verticaldirection; the air flows are subjected to heat exchange while passing,where water vapor in the high-temperature air flow in the air path inthe vertical direction is condensed with cold, and the condensed waterflows downwards and out of the heat exchanger along the sidewall of theair path, and is applied to the clothes dryer or the washer dryer; thehot air path 31 is a circulation air path of the clothes dryer or thewasher dryer, and the cold air path 32 is an air path. The longitudinalair path is communicated with a wet-hot air outlet of the circulationair path of the clothes dryer or the washer dryer through the fans, andthe transversal air path is communicated with external air through thefans; the fans are used for sucking the external air into the air pathin the horizontal direction, and sucking the wet-hot air in the clothesdryer into the air path in the vertical direction; the water vapor inthe wet-hot air is condensed into condensed water through conductionheat dissipation of the fins, and the condensed water flows downwardsand out of the heat exchanger along the sidewall of the air path toachieve a water collection box of the clothes dryer or the washer dryer.

In order to enhance the strength of the heat exchanger, improve therunning reliability of the heat exchanger, prolong the service life,reduce the failure maintenance rate of the machine, and reduce themaintenance cost of the machine, a frame is arranged outside the heatexchanger in the present disclosure; a frame plate 8 is arranged on eachof the upper side, the lower side, the left side, the right side, thefront side and the rear side of the heat exchanger, and the frame is ofan enclosure structure formed by connecting the frame plates 8 which arearranged on the side surfaces of the heat exchanger, thus the heatexchanger with the frame is formed.

As shown in FIG. 5, FIG. 6, FIG. 7, FIG. 8 and FIG. 9, through holes 9cooperated with the air paths of the heat exchanger inside are arrangedin the two groups of opposite frame plates 8 on the frame, and the othergroup of the opposite frame plates 8 is flat plates; on one hand, theflat plates enable the frame to form a sealed cavity, and on the otherhand, the flat plates are connected with the other two groups ofopposite frame plates to further enhance a connection effect, therebyavoiding deformation of the two groups of opposite frame plates.

A connection part is arranged at the junction of two frame plates of theframe, and two adjacent frame plates are connected through thecorresponding connection part; each connection part may be of a bucklestructure; and the frame is simple in structure and convenient toinstall.

Further, each buckle structure is as follows: notches 13 are arranged inthe edge of one frame plate 8, a cylindrical clamping column 14 isarranged in each notch 13, a clamping bulge 15 is arranged on the edgeof the frame plate 8 connected with the frame plate, a hole 16 is formedin each clamping bulge 15, each clamping bulge 15 is connected into thecorresponding notch 13 in an insertion manner, the two frame plates 8realize positioning, and the clamping column 14 in each notch 13 isconnected into the hole 16 in the corresponding clamping bulge 15 in aninsertion manner to realize connection.

Or each buckle structure is as follows: T-shaped clamping tongues 17 arearranged on the edge of one frame plate 8, splayed clamping ports 18 arearranged in the edge of the frame plate connected with the frame plate,each T-shaped clamping tongue 17 is connected into the correspondingsplayed clamping port 18 in an insertion manner, each T-shaped clampingtongue 17 is inserted from one wider end of the corresponding splayedclamping port 18, each clamping port 18 has a certain deformationamount, one narrower end of each splayed clamping port 18 is stronglyjacked to be wide by the corresponding clamping tongue 17, and after thewider head part of each clamping tongue 17 is inserted into thecorresponding clamping port 18, the clamping port 18 recovers to anoriginal shape, and the clamping tongue 17 cannot be reversely withdrawnto realize fixed connection.

Or each buckle structure is as follows: convex buckle 19 are arranged onthe side surface of the edge of one frame plate 8, a folded edgevertical to the frame plate 8 connected with the frame plate is arrangedon the edge of the frame plate, concave clamping grooves 20 are arrangedat positions corresponding to the buckles on the side surface of thefolded edge, and each buckle is connected with the correspondingclamping groove in a clamping manner.

The abovementioned buckle structures can be used independently, or anytwo or three of the buckle structures can be used on the same frame in acombined manner.

A plurality of parallel grooves 21 are arranged in the inner surfaces ofthe two groups of frame plates 8 with the through holes 9, the grooves21 are corresponding to the closely fitted turn-ups 7 around the heatexchanger, and the closely fitted turn-ups 7 are connected into thegrooves 21 in the inner surfaces of the corresponding frame plates in aninsertion manner; the turn-ups of each fin 1 and the turn-ups of theupper fin or the lower fin of the fin are closely bonded, and then areinserted into the grooves 21 in the frame; and in this way, the fins canbe fixed, and a role of enhancing the strength of the fins to improvethe working reliability is also played.

Specifically, the heat exchanger includes a plurality of fins 1 whichare superposed up, two opposite sides of each fin are bent upwards andcooperated with the upper fin of the fin to form a ventilating air path;two adjacent fins are arranged in a longitudinal-transverse alternatingmanner to form a transversal air path and a longitudinal air path whichare mutually independent and spaced in an up-down direction; and thethrough holes arranged in the two groups of opposite frame platescorrespond to the inlets and the outlets of the transversal air path andthe longitudinal air path respectively. Four sides of each fin 1 arebent outwards to form turn-ups 7, the turn-ups of each upper and loweradjacent fins 1 are superposed, the turn-ups at the slots are superposedonto the turn-ups 7 which are bent upwards and then bent outwards, ofthe lower fin of the fin, and the turn-ups are closely bonded; and thegrooves 21 in the inner surface of each frame plate correspond to theclosely fitted turn-ups 7, and the closely fitted turn-ups 7 areconnected into the grooves 21 in the inner surfaces of the correspondingframe plates 8 in an insertion manner.

A plurality of sheet-shaped bulges 22 vertical to the two groups offrame plates 8 with the through holes 9 are arranged on each twoadjacent edges of the frame plates, the shape of each sheet-shaped bulge22 is the same as the shape of a space between the correspondingadjacent turn-ups at the corresponding pin, and each sheet-shaped bulge22 is connected into the space between the corresponding adjacentturn-ups at the corresponding pin in an insertion manner.

Specifically, downwards-convex pins 4 are arranged on the lower surfacesof the two upwards bent sides of each fin 1, downwards concave slots 5are arranged in the upper surfaces of the other two sides of each fin 1,and the pins 4 of each fin 1 are inserted into the slots 5 of the lowerfin of the fin to connect the upper and lower adjacent fins; at leastone pin 4 may be arranged at the four corners of each fin respectively,turn-ups 7 which are bent downwards and then bent outwards are arrangedat one side of each pin, turn-ups 7 which are bent upwards and then bentoutwards are arranged at the other side of each pin, and the turn-ups 7are smoothly transited at the pin 4; the shape of each sheet-shapedbulge 22 is the same as the shape of a space between the correspondingadjacent turn-ups at the corresponding pin, and each sheet-shaped bulge22 is connected into the space between the corresponding adjacentturn-ups at the corresponding pin in an insertion manner.

In the heat exchanger with the frame in the present disclosure, the heatexchangers are connected with each other through the pins 4 and theslots 5, and the bonded turn-ups 7 of each two adjacent fins areinserted into the grooves 21 of the corresponding frame plates to fixthe heat exchanger and enhance the strength; moreover, the sheet-shapedbulges on the frame plates are inserted into a space between theturn-ups which are transited at the corresponding pin to realize furtherfixation; and the structures are mutually limited, mutually located,mutually assembled and mutually supported.

Sealing baffle plates 23 are arranged outside the frame; and, sealingbaffle plates 23 may be arranged on the edges of the frame plates 8which are provided with the through holes cooperated with the air pathsof the heat exchanger inside to enhance the sealing property of theframe, so that the whole heat exchanger is high in appearanceintegrality.

In another embodiment of the present disclosure, a plurality of the heatexchangers 35 can be connected for use, thus the contact area and timeof the cold air flow and the hot air flow are increased, and then theheat exchange efficiency is increased.

The frame in the present disclosure has both roles of positionedconnection and reinforcing, thereby improving the reliable running ofcomponents; the frame is further capable of fixing each fin of the heatexchanger, and can be mutually assembled and mutually positioned witheach fin; and the frame is simple in structure and convenient toinstall.

In the clothes dryer or the washer dryer, the condensing structure isused for condensing the wet-hot air on the circulation air path of theclothes dryer or the washer dryer; the lint is generated during runningdrying, and is liable to accumulate in long-time running due to a highnumber of fin layers in the heat exchanger 35; in order to prevent thelint brought out by the hot air path 31 from the interior of the clothesdryer or the washer dryer from blocking the air paths of the heatexchanger 35, a filtering structure 26 is arranged at the hot air inlets24 of the heat exchanger 35, and used for effectively filtering the lintand other impurities and preventing the lint and other impurities fromentering the heat exchanger to cause unsmooth flowing in the air pathsor cause blockage to the air paths. A filtering structure is arranged atthe hot air inlets 24 of the heat exchanger 35, and the filteringstructure 26 is arranged between the air inlet 36 of the condensingstructure and the hot air inlets 24 of the heat exchanger 36 in apushable-pullable manner.

As shown in FIG. 3 and FIG. 4, an upper cover plate 25 is arranged atthe hot air inlets 24 of the heat exchanger 35, the upper cover plate 25is provided with an inclined top surface, the upper cover plate 25 andthe heat exchanger form a chamber 28, and the air inlet 36 is formed inthe chamber 28 at one end where the upper cover plate is inclined highlyand far away from the heat exchanger; the end where the upper coverplate is inclined highly and far away from the heat exchanger is bentupwards, and forms the air inlet 36 of the condensing structure with theopposite other side surface; the filtering structure is arranged in thechamber 28, the air inlet 36 is located in one side of the filteringstructure, and the hot air inlets 24 of the heat exchanger are locatedin the other side of the filtering structure. In this way, after the hotair enters the air inlet 36 and before the hot air enters the hot airinlets 24, the lint in the hot air is blocked by the filteringstructure, and prevented from entering the heat exchanger, and thefiltering structure needs to be regularly cleaned only.

The filtering structure 26 is slidably connected with the sidewall ofthe chamber 28, and one end of the filtering structure stretches out ofthe chamber 28; a length of the filtering structure 26 in apushable-pullable direction is greater than a length of the heatexchanger 35 in the pushable-pullable direction of the filteringstructure; when one end of the filtering structure 26 is located on theinnermost part of the chamber 28, the other end of the filteringstructure is located outside the chamber. The filtering structure 26 canbe pulled outwards to be cleaned; and when one end of the filteringstructure 26 is located on the innermost part of the chamber 28, the endlocated outside the chamber 28, of the filtering structure 26, issealingly connected with an opening which penetrates through the chamber28, of the filtering structure, thus no leakage of the hot air insideduring normal use of the machine is ensured.

Sliding chutes/sliding blocks are arranged on each of the two sides ofthe filtering structure 26, sliding blocks/sliding chutes are arrangedon the sidewall of the chamber corresponding to the filtering structure,each sliding chute/sliding block is cooperated with the correspondingsliding block/sliding chute to form sliding connection, thuspushable-pullable for the filtering structure is facilitated.

The filtering structure 26 and the heat exchanger 35 are arranged at thebottom of the clothes dryer or the washer dryer, and arranged verticallyto the front panel 29 of the clothes dryer or the washer dryer; and thefiltering structure 26 can be pushed and pulled along a directionvertical to the front panel 29 of the clothes dryer or the washer dryer.One end of the filtering structure 26 is located on the innermost partof the chamber 28, and the other end of the filtering structure 26 islocated outside the chamber 28 during normal condensing; and thefiltering structure can be cleaned only by opening a bottom trim andpulling outwards the filtering structure during cleaning.

The filtering structure is a filtering screen, and the area of thefiltering screen corresponds to the area of the air inlet of the heatexchanger; a frame body is arranged around the filtering screen; slotsare arranged in the inner sidewall of the upper cover plate; and theframe body is connected into the slots in the inner sidewall of theupper cover plate in an insertion manner to form sliding connection.

Because the lint is generated during drying, the lint is liable toaccumulate in long-time running due to a high number of fin layers ofthe heat exchanger 35 and a small gap between two adjacent layers; thelint is liable to accumulate at the filtering structure in long-timerunning after the filtering structure is arranged; in order tofacilitate cleaning the lint in the heat exchanger, a flushing structureis arranged at the hot air inlets of the heat exchanger 35; or in orderto facilitate cleaning the lint filtered by the filtering structure, aflushing structure is arranged between the air inlet 36 of thecondensing structure and the hot air inlets 24 of the heat exchanger;and the flushing structure is located above the filtering structure.

As shown in FIG. 13, the flushing structure includes a spray layer 40and a sealing cover 41, the spray layer 40 and the sealing cover 41 forma cavity, a plurality of spray holes 42 are arranged in the spray layer40, a water inlet 43 is arranged in the sealing cover 41, and the waterinlet 43 of the sealing cover 41 is connected with a water pump 44, andis communicated with running water or other water sources through thewater pump 44. The flushing structure may be used for regularly washingthe heat exchanger when drying running is concluded or during a runningprocess; a gap between the spray layer 40 and the sealing cover 41 issmall, and a certain water pressure can be formed; and the waterpressure enables each spray hole to spray a water column for washingeach air path of the heat exchanger.

An upper cover plate 25 is arranged at the hot air inlets 24 of the heatexchanger, the upper cover plate 25 is provided with an inclined topsurface, the upper cover plate 25 and the heat exchanger form a chamber28, and the air inlet is formed in the chamber 28 at one end where theupper cover plate is inclined highly and far away from the heatexchanger; the end where the upper cover plate is inclined highly andfar away from the heat exchanger is bent upwards, and forms the airinlet 36 of the condensing structure with the opposite other sidesurface; the spray layer 40 is the inclined top surface of the uppercover plate 25, and a plurality of spray holes 42 are arranged in theinclined top surface; and the plurality of spray holes 42 are uniformlyarranged in the upper cover plate 25.

The hole diameter range of each spray hole 42 is 2 mm to 6 mm, and adistance is 5 mm to 10 mm, thus washing for all the air paths of theheat exchanger is facilitated.

The sealing cover 41 is arranged on the upper part of the upper coverplate 25 and hermetically connected with the upper cover plate 25, and asmall gap is formed between the spray layer and the sealing cover. Thegap is 4 mm to 8 mm. The gap is capable of ensuring that the enteringwater can form a certain water pressure inside, and the water pressureenables each spray hole to spray a water column for washing the airpaths.

The flushing structure is located on the upper part of the filteringstructure 26, and is capable of washing the filtering structure, withoutthe need of opening the bottom trim every time; and the filteringstructure 26 can be cleaned only by being withdrawn.

The air inlet 36 of the condensing structure is an integrated air port,the hot air inlets 24 of the heat exchanger are a plurality of airports, and the section area of the air inlet of the condensing structureis less than the section area of each hot air inlet of the heatexchanger; the air outlet 37 of the condensing structure is anintegrated air port, the hot air outlets of the heat exchanger are aplurality of air ports, and the section area of the air outlet 37 of thecondensing structure is less than the section area of each hot airoutlet of the heat exchanger; in order to realize uniform transitionfrom the air inlet 36 of the condensing structure for hot air to the hotair inlets 24 of the heat exchanger, an air intake uniform structure isarranged between the air inlet 36 of the condensing structure and thehot air inlets 24 of the heat exchanger; in order to realize uniformtransition of the hot air from the hot air outlets of the heat exchangerto the air outlet of the condensing structure, an air outtake uniformstructure is arranged between the air outlet of the condensing structureto the hot air outlets of the heat exchanger.

As shown in FIG. 14 and FIG. 15, the air outtake uniform structure is asfollows: an upper cover plate 25 is arranged at the hot air inlets 24 ofthe heat exchanger, the upper cover plate 25 is provided with aninclined top surface, the upper cover plate 25 and the heat exchangerform a chamber 28, and the air inlet is formed in the chamber at one endwhere the upper cover plate is inclined highly and far away from theheat exchanger; a plurality of ribbed slabs 38 which are arranged inparallel are arranged on the inner surface of the air inlet, and theribbed slabs 38 are used for dividing the air inlet 36 into a pluralityof air paths. In this way, the hot air uniformly enters each hot airinlet 24 of the heat exchanger under the guide of the air paths composedof the ribbed slabs 38.

The ribbed slabs 38 are arranged along the hot air inlets 24 of the heatexchanger, and a gap space between two adjacent vs 38 corresponds to thecorresponding hot air inlet 24 of the heat exchanger 35. The end wherethe upper cover plate is inclined highly and far away from the heatexchanger is bent upwards, and forms the air inlet por with the oppositeother side surface. A plurality of parallel ribbed slabs 38 vertical tothe two opposite inner surfaces of the air inlet are uniformly arrangedon the inner surfaces, and the ribbed slabs 38 are vertically arranged.

A plurality of parallel ribbed slabs 38 are arranged on the innersurface of the inclined top surface of the upper cover plate 25; theupper parts of the ribbed slabs 38 are connected with the inclined topsurface, and the lower parts of the ribbed slabs 38 are suspended; theheight changes of the vs 38 corresponds to the inclination angle of theinclined top surface; the heights of the ribbed slabs 38 are graduallyreduced from the air inlet to the interior; and a plane composed of thelower parts of the ribbed slabs 38 is parallel to the upper surface ofthe heat exchanger.

The upper cover plate 25 and the ribbed slabs 38 are integrallyarranged, and may be formed through integral injection.

As shown in FIG. 4, the air outtake uniform structure is as follows: alower cover plate 39 is arranged at the condensed hot air outlets of theheat exchanger, a plurality of air outlets are arranged in one side ofthe lower cover plate 39, and the plurality of air outlets arecommunicated with a main air outlet in a shape of Chinese character “

”, and are connected to the air ducts 27 of the clothes dryer or thewasher dryer; in this way, the condensed hot air outputted from the heatexchanger passes through the plurality of air outlets at first, and thenis gathered into the air ducts of the clothes dryer or the washer dryer.The upper cover plate 25 and the lower cover plate 39 are connected withthe heat exchanger in a clamping manner, and may be hermeticallyconnected with two flat plate-shaped frame plates.

The above only describes embodiments of the present disclosure. Itshould be noted that, for those ordinary skilled in the art, severaltransformations and improvements can be made under the premise of notdeparting from the principle of the present disclosure, which shall alsobe considered as the protection scope of the present disclosure.

What is claimed is:
 1. A dryer or a washer dryer, comprising a clothesdrying system, wherein the clothes drying system comprises a heatingstructure and a condensing structure; the condensing structure isarranged on a lower part of the dryer or the washer dryer; thecondensing structure comprises an air inlet and an air outlet for hotair, and further comprises a gas inlet and a gas outlet for cold air,and a heat exchanger is arranged inside the condensing structure; theheat exchanger is composed of a plurality of fins which are superposedin a longitudinal-transverse alternating manner, and a frame with anenclosure structure is arranged outside the heat exchanger; wherein twoopposite side edges of each fin of the plurality of fins are bentupwards and in coordination with a respective upper fin to form an airpath for ventilating, and adjacent fins are arranged in a mode ofvertical-horizontal alternating so as to form transversal air paths andlongitudinal air paths independent from each other; the longitudinal airpaths are vertically arranged to correspond to the air inlet and the airoutlet; the transversal air paths are horizontally arranged tocorrespond to the gas inlet and the gas outlet; downwards convex pinsare arranged on lower surfaces of two upwards bent side edges of theeach fin, and downwards concave slots are arranged in upper surfaces ofother two side edges of the each fin, and the pins of the each fin areinserted into slots of a respective lower fin so as to connect an upperand a lower adjacent fins.
 2. The dryer or the washer dryer according toclaim 1, wherein a length direction of the condensing structure isarranged vertically to a front panel or a side plate of the washerdryer; the air inlet of the condensing structure is located in an upperpart, the air outlet of the condensing structure is located in a lowerpart, and the air inlet and the air outlet are communicated with a drumthrough an air duct respectively; and one of the gas inlet and the gasoutlet is provided with fans, and the other one is communicated withatmosphere.
 3. The dryer or the washer dryer according to claim 1,wherein the each fin is provided with a plurality of downward profiledgrooves in parallel in a direction vertical to the air path formed bythe each fin and the respective upper fin, and an air path formed with arespective lower fin is divided into a plurality of parallel air pathsby the plurality of downward profiled grooves; downward profiled groovesprovided on the each fin in the air inlet and the air outlet in a frontand a rear of the air path formed between the each fin and therespective upper fin form the slots of the each fin; and, a profileddepth on both ends of the profiled grooves is greater than a profileddepth in middle of the profiled grooves, so that a downward bulge isformed, so as to form the pins.
 4. The dryer or the washer dryeraccording to claim 1, wherein four side edges of the each fin are bentoutwards to form turn-ups; turn-ups of adjoining upper and lower finsare overlapped; turn-ups at the slots are overlapped and fitted closelyon turn-ups, which are bent upwards first before bent outwards, on alower fin; and, the fins are plastic fins.
 5. The dryer or the washerdryer according to claim 1, wherein frame plates are arranged on anupper side, a lower side, a left side, a right side, a front side and arear side of the heat exchanger, and the frame is of an enclosurestructure formed by connecting the frame plates; wherein through holescooperated with air paths of an internal heat exchanger are arranged intwo groups of opposite frame plates opposite to the transversal airpaths and the longitudinal air paths, and another group of oppositeframe plates are flat plates; and, the through holes are rectangularthrough holes arranged transversally and longitudinally.
 6. The dryer orthe washer dryer according to claim 5, wherein a connection part isarranged at a junction of each frame plate on the frame, and adjacentframe plates are connected through respective connection parts; theconnection part of the each frame plate is of a buckle structure; aplurality of parallel grooves are arranged on internal surfaces of thetwo groups of opposite frame plates with the through holes, and theparallel grooves correspond to closely fitted turn-ups around the heatexchanger, and the closely fitted turn-ups are inserted into theparallel grooves of the internal surfaces of the two groups of oppositeframe plates; and, a plurality of sheet-shaped bulges vertical to eachof the two groups of opposite frame plates are arranged on adjacentedges of the each of the two groups of opposite frame plates with thethrough holes; a shape of each of the sheet-shaped bulges is identicalwith that of a space between corresponding adjacent turn-ups at arespective pin, and the each of the sheet-shaped bulges is inserted intothe space between the corresponding adjacent turn-ups at the respectivepin.
 7. The dryer or the washer dryer according to claim 1, wherein anupper cover plate is arranged at hot air inlets of the heat exchanger,the upper cover plate has a inclined top surface, the upper cover plateforms a chamber with the heat exchanger, and the air inlet of thecondensing structure is formed on the chamber at one end where the uppercover plate is inclined highly and away from the heat exchanger; a lowercover plate is arranged at hot air outlets of the heat exchanger, oneside of the lower cover plate is the air outlet of the condensingstructure; and the upper cover plate and the lower cover plate areconnected with flat frame plates.
 8. The dryer or the washer dryeraccording to claim 7, wherein a filtering structure is arranged betweenthe air inlet of the condensing structure and the hot air inlets of theheat exchanger; the filtering structure is arranged between the airinlet of the condensing structure and the hot air inlets of the heatexchanger in a pushable-pullable manner; the filtering structure isarranged in the chamber, the filtering structure is slidably connectedwith sidewalls of the chamber, one end of the filtering structureprotrudes out of the chamber, and when one end of the filteringstructure is located in the innermost part of the chamber, the other endof the filtering structure is located outside the chamber andhermetically connected with an opening of the chamber through which thefilter penetrates; and, sliding chutes/sliding blocks are arranged ontwo side edges of the filtering structure, and sliding blocks/slidingchutes are arranged on corresponding sidewalls of the chamber, and thesliding chutes/sliding blocks of the filtering structure are matchedwith the sliding blocks/sliding chutes of the chamber so as to formsliding connection.
 9. The dryer or the washer dryer according to claim1, wherein a flushing structure is arranged between the air inlet of thecondensing structure and hot air inlets of the heat exchanger; theflushing structure comprises a spray layer and a sealing cover whichform a cavity; a plurality of spray holes are arranged in the spraylayer; water inlets are arranged in the sealing cover; the spray layerserves as an upper cover plate arranged at the hot air inlets of theheat exchanger; the sealing cover is arranged on an upper part of theupper cover plate and hermetically connected with the upper cover plate,and a plurality of spray holes are arranged in the upper cover plate.10. The dryer or the washer dryer according to claim 7, wherein an airintake uniform structure is arranged between the air inlet of thecondensing structure and the hot air inlets of the heat exchanger; aplurality of vertical ribbed slabs are arranged in the air inlet and onan inner surface of top of the upper cover plate so as to divide the airinlet into a plurality of uniform air paths, so that the air intakeuniform structure is formed; an air outtake uniform structure isarranged between the air outlet of the condensing structure and the hotair outlets of the heat exchanger; and, a plurality of air outlets arearranged on one side of the lower cover plate, and the plurality of airoutlets in a shape of Chinese character “

” are communicated to a general air outlet, so that the air outtakeuniform structure is formed.
 11. The dryer or the washer dryer accordingto claim 2, wherein the each fin is provided with a plurality ofdownward profiled grooves in parallel in a direction vertical to the airpath formed by the each fin and the respective upper fin, and an airpath formed with a respective lower fin is divided into a plurality ofparallel air paths by the plurality of downward profiled grooves;downward profiled grooves provided on the each fin in the air inlet andthe air outlet in a front and a rear of the air path formed between theeach fin and the respective upper fin form the slots of the each fin;and, a profiled depth on both ends of the profiled grooves is greaterthan a profiled depth in middle of the profiled grooves, so that adownward bulge is formed, so as to form the pins.
 12. The dryer or thewasher dryer according to claim 3, wherein four side edges of the eachfin are bent outwards to form turn-ups; turn-ups of adjoining upper andlower fins are overlapped; turn-ups at the slots are overlapped andfitted closely on turn-ups, which are bent upwards first before bentoutwards, on a lower fin; and, the fins are plastic fins.
 13. The dryeror the washer dryer according to claim 2, wherein frame plates arearranged on an upper side, a lower side, a left side, a right side, afront side and a rear side of the heat exchanger, and the frame is of anenclosure structure formed by connecting the frame plates; whereinthrough holes cooperated with air paths of an internal heat exchangerare arranged in two groups of opposite frame plates opposite to thetransversal air paths and the longitudinal air paths, and another groupof opposite frame plates are flat plates; and, the through holes arerectangular through holes arranged transversally and longitudinally. 14.The dryer or the washer dryer according to claim 3, wherein frame platesare arranged on an upper side, a lower side, a left side, a right side,a front side and a rear side of the heat exchanger, and the frame is ofan enclosure structure formed by connecting the frame plates; whereinthrough holes cooperated with air paths of an internal heat exchangerare arranged in two groups of opposite frame plates opposite to thetransversal air paths and the longitudinal air paths, and another groupof opposite frame plates are flat plates; and, the through holes arerectangular through holes arranged transversally and longitudinally. 15.The dryer or the washer dryer according to claim 4, wherein frame platesare arranged on an upper side, a lower side, a left side, a right side,a front side and a rear side of the heat exchanger, and the frame is ofan enclosure structure formed by connecting the frame plates; whereinthrough holes cooperated with air paths of an internal heat exchangerare arranged in two groups of opposite frame plates opposite to thetransversal air paths and the longitudinal air paths, and another groupof opposite frame plates are flat plates; and, the through holes arerectangular through holes arranged transversally and longitudinally. 16.The dryer or the washer dryer according to claim 2, wherein an uppercover plate is arranged at hot air inlets of the heat exchanger, theupper cover plate has a inclined top surface, the upper cover plateforms a chamber with the heat exchanger, and the air inlet of thecondensing structure is formed on the chamber at one end where the uppercover plate is inclined highly and away from the heat exchanger; a lowercover plate is arranged at hot air outlets of the heat exchanger, oneside of the lower cover plate is the air outlet of the condensingstructure; and the upper cover plate and the lower cover plate areconnected with flat frame plates.